Yes, the stutters go away with ground clutter off and return when it's enabled again.
I can see the stutters below 300 which also means rolling on the runway goes in leaps or steps. The feeling is like driving a car on a German Autobahn based on concrete slabs: Although the joint isn't visible through the tarmac, the bump can still be felt. A train fare on non-welded rails describes it also quite well.
But yes, for me it's the ground clutter.